(Indicate by check mark whether the registrant files or will
file annual reports under cover of Form 20-F or Form 40-F.)

Form
20-F xForm 40-F ¨

(Indicate by check mark if the registrant is submitting the
Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1).)

Yes
¨No x

(Indicate by check mark if the registrant is submitting the
Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7).)

Yes
¨No x

(Indicate by check mark whether the registrant by furnishing
the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b)
under the Securities Exchange Act of 1934.)

Yes
¨No x

(If “Yes” is marked, indicate below the file number
assigned to the registrant in connection with Rule 12g3-2(b): 82- )

Exhibit Index

Exhibit Number

Description

99.1

Hanwha Q CELLS to Announce Fourth Quarter
and Full Year 2017 Financial Results on April 11

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act
of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Hanwha Q CELLS Co., Ltd.

Date:
March 30, 2018

By:

/s/ Seong Woo Nam

Name:

Seong Woo Nam

Title:

Chairman and CEO

Exhibit 99.1

Hanwha Q CELLS to Announce Fourth Quarter and Full Year 2017
Financial Results on April 11

SEOUL, Korea (March 30, 2018) – Hanwha Q CELLS
Co., Ltd. (“Hanwha Q CELLS” or the “Company”) (NASDAQ: HQCL), one of the world’s largest photovoltaic
manufacturers of high-quality, high-efficiency solar modules, today announced that it will release its fourth quarter and full
year 2017 financial results before the market opens on Wednesday, April 11, 2018. The Company will host a conference call to discuss
the results and updated business outlook at 8:00 AM Eastern Time (9:00 PM Korea Time).

Conference Call

A live webcast of the
conference call will be available on the investor relations section of the Company’s website at www.hanwha-qcells.com
or by clicking the following hyperlink:https://edge.media-server.com/m6/p/p6fkxxy9

The dial-in details for the live conference call are as follows:

International Toll Free Dial-In Number

+65 6713-5090

United States

+1 (845)675-0437

South Korea

+82 2-6490-3660

Germany

08001820671

United Kingdom

China, Domestic

Hong Kong

+44 2036214779

4006208038 / 8008190121

+852 30186771

Passcode: HQCL

A replay of the call will
be available after the conclusion of the conference call on the investor
relations section of the Company’s website at www.hanwha-qcells.com
and also by dialing the numbers below:

International Toll Free Dial-In Number

+61 2 8199 0299

United States

+1 (855) 452-5696

South Korea

00798-6136-1602

Germany

United Kingdom

08001802149

08082340072

China, Domestic

Hong Kong

8008700206 / 4006322162

800963117

Conference ID: 6998149

Replay time period: April 11, 2018 11:00 ET
– April 19, 2018 09:59 ET

# # #

About Hanwha Q CELLS

Hanwha Q CELLS Co., Ltd. (NASDAQ:HQCL) is
one of the world´s largest and most recognized photovoltaic manufacturers for its high-performance, high-quality solar cells
and modules. It is headquartered in Seoul, South Korea (Global Executive HQ) and Thalheim, Germany (Technology & Innovation
HQ) with its diverse international manufacturing facilities in Malaysia and China. Hanwha Q CELLS offers the full spectrum of
photovoltaic products, applications and solutions, from modules to kits to systems to large-scale solar power plants. Through
its growing global business network spanning Europe, North America, Asia, South America, Africa and the Middle East, the company
provides excellent services and long-term partnerships to its customers in the utility, commercial, governmental and residential
markets. Hanwha Q CELLS is a flagship company of Hanwha Group, a FORTUNE Global 500 firm and a Top 10 business enterprise in South
Korea. For more information, visit: http://www.hanwha-qcells.com.